Pump, &amp;c.



F. W. MAGHLET.

PUMP, 6w. APPLICATION FILED APR. 1, 1908.

3 SHEETS-SHEET 1.

Patented Oct. 25, 1910.

Fly-1 PUMP, aw. "APPLICATION IILED APR. 1, 1908.

.F. W. MAGHLET.

, H a m I m g n" W W, m W m m 0 \m m& y m \\\\\.w W w mmvron ATTORNEY WITNESSES;

F. w. MAGHLEIT.

PUMP, 6w. APPLICATION FILED APR- 1,1908.-

Patented Oct. 25, 1910.

3 SHEETS- 8111231 3.

FRITZ W. MACHLET, 0F ELIZAl BETH, NEW JERSEY.

Specification of Letters Patent. P t nted 0015.25, 1910.

- Application fil ed April 1, 190a. Seria1No. 424,689.

To all whov n it'may coace r'n:

Be it known that I, FRITZ W. MAoHLE'i, a citizen of the United States, residing in Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Pumps, &c., of which the following is a specification.

This invention relates principally to liquid seals or packings-for intergeared pistons of engines, air or gas pumps, blowers, etc., and more especially to blowers or air compressors.

While thereis a great demand for low pressure air or gas pumps, still it has not heretofore been found practicable to secure by means of intergeared pistons a su'fiicient pressure to meet the demand. I have. devised means whereby pumps or blowers of this. class may be'caused to deliver air or gas steadily at any required pressure up to I twenty or more pounds per square inch, and

may in some easesbe used as air compressors.

has heretofore been limited by the leaking of air or gas past the edges and sides of the pistons, whenever it has been attempted to secure more than one or twopounds pressure to the square inch. I have devised means for efl'ecting a constant circulation of liquid or lubricant through the pump. in

such a manner as to seal the edges and ends of the pistons. sufiiciently to enable pressure of the delivered air or .gas to be raised far above that which hasheretofore been found practicable, andhave thus converted a low .pressureblower to a moderate pressure or even. high pressure air or gas compressor.

In the preferred form of practicing. the

4Q present invention, each of the intergeared plstons ismade in-the form of a'shell, and the liquidor lubricant .is forced into the chambers of each piston under sufiicient ressure to cause the liquid to oozeor exude om the. pistons between the side edges thereof-and the side walls of the drum in.

' which they revolve, whereby said side edges are sea1ed,fland leakage of air or gas is prevented. I providealso a basin beneath. the

pistons to catch the drip therefrom, and the accumulated drip is taken up by, the inflows ing air anddellv ered to the revolving pistons, to be swept around by the vanes or lobes thereof, thus forming seals between the ends of the pistons and the inner peripheries of the drum, and also forming seals'between The capacity of intergeared piston pumps the intermeshing lobes of the pistons. erably the lobes are relatively numerous to increase the number of seals, so as to make many barriers for the compressed air between the delivery and intake sides of the pump, whereby liability of leakage is minim zed or avoided.

Pref- The intermeshing vanes or lobes of thepistons may run in contact with one another, thus tending to restrict the escape of compressed air past the same; and the presence of the liquid seal between the meshing lobes makes such escape practically impossible. When the intermeshing pistons are also provided with controlling gears, there may be slight clearances between the meshing lobes of the pistons, and said clearances may be I readily sealed by the liquid swept around by the pistons.

Upon the delivery side of the engine, pump, or compressor, I preferably arrange a separator to collect the liquid, which is thence led back through ports in the side wall or walls of the drum, and introduced again into the chambers of the pistons. It will be understood that the pressure of the delivered air or gas is, sutficient toforce the liquid back to said pistons, so that the cir culation -of the liquid into and out ofthe pump is practically unintermittent, and hence the sealing isconstant. The liquid is also forced by the same means through other joints in -the-pump to seal the same, with great resultant economy of operation.

In the accompanying drawings, Figure 1 a transverse sectional elevation of one form of blower or compressor embodying my improvements; the pistons being shown .full of the sealing'liquid. Fig. 2 is a longitudinal section of the same. Fig.3 is an enlarged diagrammatic cross section of the intermeshing lobes of the pistons illustrat ing the clearance therebetween. Fig. 4 is a sectional plan of the blower. p

- Within a drum 1, comprising two opposed 'C-shaped segments 2, 3, revolve pistons 4, 5,

each having for instance six lobes or vanes 6 to intergear with the lobes of. the other piston. -Each piston is chambered and preferably made in the form of a shell,"whose convolutions are united by a web 7 to a hub 84 By means of said hubs, the pistons are secured upon shafts 9, 10, respectively, the

shaft 10 carrying a fly-wheelor pulley 11.

The liquid for s wlin and lubricating the pistons is seen at 12 wi in a separator 13 of 7 any suitable type, and conveniently erected upon the top or delivery side of the pump directly over the deliveryorifice 14 thereof. The liquid is caused by the pressure of the delivered air or gas to fiow down through a pipe or siphon 15, having at its lower end branches 16, 17, to enter ports 18, 19 in the side walls 20 of the drum; said ports being arched so as always to be within the contour of th'e'pistons and deliver the liquid directly into the chambers thereof. The pressure upon the liquid in the separator 13 is suflicient to force it to exude from the side edges of the pistons, to form films or seals between said edges and the side walls 20, 21 of the drum, to prevent leakage of compressed air or gas past the same. It will be seen, Figs. 2 and 4, that the end of each hub is cut off to form an open passage 22 on the end there-.

of adjacent vto the ports 18, 19, so as to increase the facility of communication between each port and all of the chambers in its associated piston.

The drip from the pistons and walls is caught in a basin 23 formed in the blower below the intake orifice 24 thereof, so that the accumulated drip seen at 25 may be taken up by air or gas entering through the inlet pipe 26, and delivered to the lobes or vanes of the pistons as indicated at 27 to be swept around thereby as indicated at. 28,'the films of liquid forming between the tips or ends of the vanes and the inner periphery of the segments 2, 3 of the drum. These films are sufficient to prevent leakage of air or gas. Each film affords a substantial obstacle to leakage; and when the lobesof each piston are numerous, as illustrated, so thatthere are always three or four films around the drum between the delivery and intake sides thereof, loss of air pressure through leakage is practically avoided; and the same holds true as to the sides of the pistons, there being always many films at the side edges to cooperate to prevent loss of compressed an.

At Fig. 1, the particles of liquid are indicated at 29 in the column of ascending air; and it will be understood that said particles may sometimes settle between the intermesh drum may be secured meshing gears 31, 32;

although not in all cases necessary. When the gears are employed, there may be left a slight clearance as at 33, Fig. 3, between the intermeshing lobes of the pistons, to avoid friction; this clearance being however filled by the portion 30,0f liquid to form a seal and prevent leakage. The gears 31, 32 should be sealed, as by inclosing them in a box 34 formed on the outside of the drum wall, and providedl with a cover 35 having a tight joint with the edges of the box to prevent possible escape of air which may work out between the shafts and, their bearings 36, 37. The opposite end of the shaft 9 may be sealed by a cap 38 tightly'secured upon the boss 39' in which this end of the shaft turns, to prevent leakage of air.

In the boss 40 carrying the main shaft 10 is formed a recess 4]. around the shaft, and a pipe 4c2-conducts liquid which Works out along the shaft, down to the catch-basin 23. A ring 43 may be placed around the shaft within the recess 41. It will be understood that-the film of liquid, which may surround that portion of the shaft contained in the boss 40, serves as a seal to prevent leakage of air.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

: Having thus described my invention, I claim:

1.'A rotary engine, gas or air pump or blower comprising a drum, intergeared h'ollowed open-ended pistons revolving within the drum and fitting to the interior walls thereof, and means for forcing liquid or lubricant into the pistons under pressure, to cause it to exude between the side edges of the pistons and the side walls of the drum to form seals or packings for said edges.

2. A rotary engine, gas or air pump or blower comprising a drum, intergeared hollowed open-ended pistons revolving within the drum and fitting to the interior walls thereof, and means for forcing liquid or lubricant into the pistons under pressure, to cause it to exude between the side edges of the pistons and the side walls of the drum to form seals or packings for said edges, and for collecting the exuded liquid and causing it to be forced again into the pistons to maintain a circulation of the liquid through the pistons.

3. A rotary engine, gas or air pump or blower comprising a drum, intergeared hollowed pistons having openings in their sides andrevolving within the drum and fitting to the interior walls thereof, and means to force liquid into the pistons and causing the liquid to exude from said openings in the side edges thereof; said forcing means including a source of supply for the liquid, and ports communicating with said source and formed in the side walls of the drum opposite the hollows of the piston.

4. A rotary engine, gas or air pump or blower comprising a drum, intergeared hollowed pistonshaving openings-in theirsides and revolving withln the drum and fittingto the interior walls thereof, and means to force liquid into; the pistons'and causing the liquid to exude'from said openings in the s1 e edges thereof; said forcing means ineluding a source of supply for the liquid,

and ports communicating with" said source andfo'rmed in the side walls of the drum opposite the hollows of the pistons; said-ports aving such 'form and position as to be con fstantly within: the contours of the pistons! i 5. A rotary comprising a is (gas or air pump or blower rum, intergeared hollowed p'istons having openings in'their sides and revolving within the drum and fitting to the I interiorwallsthereof, a separator to collect 'liquid from the delivery side of the pump, and means to enable the pressure of the delivered air or gasto force the collected liquid into said pistons to' cause it to exude-from said openin s in the side edges thereof; a

patch-basin or the drip from the pistons being provided upon the vintake side of the pump to enable the inflowing air or gas to take up the liquid caught in the basin and ,deliver it to the vanes of the pistons to be thereby carried around to the delivery side ofthe pump.v

- .6; A rotary gas or air pump or blower l'comprising a drum, intergeared hollowed Iopen ended .pistons revolving within the Y jdrurn and fitting to the interior-walls'thereof, and means dependent upon the operation of the pump or blower to force liquid to circulate through said pistons.

- fcomprising a '1. A rotary as or air pump or blower uid to circulate, through said pistons and fixude. from saidopenings; said circulating .meansjncluding a separator to collect liquid from the delivery side of the ump, and. a

basin to catch the drip from t e pistons on theintallre side of'the pump.

8-. A rotary gas or air pump or blower'comprising a drum, intergeared; hollowed pistons having openings and revolving within the drum and fitting to the interior walls thereof, a separator to collect liquid from air or gas delivered by the pump, and means for conducting the collected liquid into the pistons and causing it to exude therefrom thrpugh said openings to form packings or sea s.

9, A rotary as or air pump or blower comprising a rum, inter eared hollowed pistons having openings'an revolving within the drum and fitting to the interior walls thereof, a separator to collect liquid from air orgas delivered by thepump, and ports communicating with said separator and .liquid to be collecte v swept around by the ends of the teeth or rum, inter eared hollowed pistons having openings an revolving within the drum and fitting to the interior walls 4 thereof, and means dependent uponthe operationof the pump or blower to force liq blower comprlsm 'the convolutions of the other means for causing liquid to circulate re formed in the, drum opposite the hollows of the pistons; meansbeing provided to cause the liquid to flow from said separatorv through the pistons and exude from the openings. therein.

10. A rotary gas or air pump or blower comprising a drum, intergeared hollowed pistons having openings and revolving with in the drumand fitting to the interior walls thereof, a separator to collect liquid from air or gas delivered by the pump,.-means being provided to cause the liquid to flow from said separator through the pistons and exude from the openings therein, and means forcollecting the liquid at the intake side of the pump, to be caught and swept around the drum b the ends of the piston teeth or vanes, toorm packings or seals for the same.

l1; Aarotarygas or'air pump or blower comprising va drum, intergeared hollowed pistons having openings and revolving within the drum and fitting to the interior walls thereof, a separator to collect liquid from air or gas delivered by the pump, means being provided to cause the liquid to flow from said separator through the pistons and exude from the openings therein, and meansfor causing a certain ortion of the exuded and taken up and vanes of the for.

12. A'rotary'engine, gas or air pump or blower comprlsing a drum, intergeared hollowed pistons having openings and revolvpiston, to form packings thereing within the drum and fitting to the inpeatedlythrough the-pistons to form seals or packings for the edges or ends thereof.

14. A rotary engine,gas orair pump or blower comprisin a drum, pistons revolving within the rum, each iston in the form of a shell open" at its en s and formed 4 withradiating convolutions to intergear with the convolutions of the other piston, ports in the walls-of the drum in communication with ends of the pistons, and means for causing liquid to'flow from the ports through the istons to exude from their edges to seal t e same; each of said pistons provided with a hub which is cut away or shortened at the port end of the piston, to

increase the facility of communication beradiating convolutions to intergear with the convolutions of the other piston, ports in the drum to communicate with the chambers of the pistons, and means dependent upon the pressure of the air, gas or steam flowing through the engine or pump, to cause liquid to circulate constantly'through said ports and pistons and exude from the edges of the latter to seal or pack the same.

16. A rotary engine, gas or air pump or blower, comprising 'a drum, pistons intergeared to revolve within the drum, said pistons hollowed or chambered and having openings, and ports provided within the drum in communication through said openings with the chambers in the pistons, said drum having a delivery orifice on its top,a separator extending u from said orifice, and means to conduct it e collected liquid to said ports.

17. A rotary engine, gas or air pump or blower, comprising a drum, intergearedv chambered pistons revolving within the drum and having openings, ports withinlthe drum to communicate through said openings with the chambers in the pistons, said drum having a deliveryorifice in its top, a separator communicating with said, orifice, and means: to conduct the collected liquid to said ports; the drum being also provided in its bottom with an intake orifice and a basin to catch the drip from the pistons.

18. A rotary engine, gas or air pump or blower, comprising a drum, intergeared chambered pistons revolving within the drum and having openings, and means to force liquid through the pistons under pressure to exude from said openings and seal the pistons; said pistons being provided outside of said drum with a pair of suitable meshing gears within a sealed casing.

19. A rotary engine, gas or air pump or blower, comprising a drum, intergeared chambered pistons having openings and revolving within the drum, said pistons being provided with a pair of suitable meshing gears, and clearances being provided between the meshing convolutions of teeth of the pistons, and means to force liquid through the pistons and out of said 0 envolving within the drum and formed with clearances between the meshing portions or lobes of the pistons, the latter being provided with a air of meshing gears, and means for causing liquid or lubricant to circulate through the blower, said circulating means comprising a basin from which the liquid is taken up by the inflowing air or gas and delivered to the ends of the pistons to be swept around thereby to form seals for said clearances, and also including a separator'upon the delivery side of the blower, means being provided to cause the collected liquid to flow back through the pistons and to exude from said openings.

21'; A rotary engine, air or gas. pump or blower, comprising a pair of intergeared pist'ons confined within a drum and mounted upon a pair of shafts which are journaled in side walls of the drum, means for circulating liquid through the pump to seal the pistons, a pair of meshinggears secured upon said shafts outside of therdrum and confined in a box formed upon a side of the drum, a cap tightly jointed to said box to prevent leakage of air, a leak-proof cap being provided at the other end of one of said shafts, a fiy-wheel or pulley mounted upon the other end of the other of said shafts, and means ,for drawing off liquid that may work out from the pump along the fly-wheel shaft and conducting it to the intake side of the blower or engine.

FRITZ w. MAGHLET.

Witnesses:

SAMUEL R. OGDEN, PHILIP C; Os'rERMAN. 

